JP2002271071A - Fan mounting device for heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan mounting device for a heat sink, which can directly mount the holding frame of a fan for forced air cooling to the heat sink utilizing simple small components and can be shared for a mounting of the holding frames to the heat sinks of different dimensions and different structures. SOLUTION: A fan mounting device for a heat sink is constituted in a structure that pawl cases 4 are fitted in the through holes 11 provided in the four corners of a holding frame 10 of a fan 1, each beak-shaped pinching pawl 3 having a cut-in groove 30 cut from the tapered point 3a of the pawl 3 toward the base end 3b of the pawl 3 is put into the cases 4, the upper edge parts of the radiation fins 21 of the heat sink 2 are made to enter the grooves 30 in the pawls 3 projected from pawl outports 43 provided in the cases 4 to the lower side and screw members 6 for press contact spirally inserted in threaded holes 42 provided in the cases 4 from above are press contacted to the pawls 3, whereby the pawls 3 are forcibly pushed out to the lower side in a shape that the pawls 3 shut the grooves 30 and the upper edge parts of the fins 21 are pinchingly attached to the pawls 3 and are fixed on the pawls 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CPU (Central Process
g Unit: relates to a fan mounting device for mounting a forced air cooling fan to a heat sink used as a radiator plate of a radiator for a central processing unit.

[0002]

2. Description of the Related Art In general, a heat sink for a CPU is made of a metal integrated material such as aluminum or an alloy thereof in which a large number of radiating fins are formed on one side of a substrate portion in parallel to rise up. Attach to socket etc. and C
By dissipating the heat generated in the PU, the PU has a function of preventing a circuit abnormality or a thermal runaway phenomenon due to the high temperature of the CPU. And in desktop and tower type personal computers, in order to enhance the heat dissipation by this heat sink,
A forced air cooling fan is mounted on the upper side of the radiating fins, and outside air is sent between the radiating fins so as to promote exhaust heat by heat exchange.

Conventionally, when such a forced air cooling fan is attached to a heat sink, for example, as shown in FIG.
A box-shaped attachment (5) also called a fan shroud is provided on the holding frame (10) of the forced air cooling fan (1) through vertical through holes (11) at four corners thereof.
In general, the lower portion of the attachment (50) is fixed to the substrate portion (20) of the heat sink (2) while the bolt (51) is fixed thereto.

[0004]

However, as the heat sink (2), the vertical and horizontal dimensions of the substrate (20), the structure and position of the attachment mounting part, and the radiation fins (21) depend on the model of the product to be applied, such as a personal computer. A variety of different heights, etc. are used. For this reason, conventionally, a dedicated attachment (50) is required for each type of the heat sink (2), and there has been a problem that the manufacturing cost is high.

In view of the above circumstances, the present invention does not require a dedicated attachment corresponding to the type of the heat sink as a conventional heat sink fan mounting device, and uses simple small parts for forced air cooling. It is an object of the present invention to provide a fan holding frame that can be directly attached to a heat sink and that can be commonly used for attaching to a heat sink having a different size or structure.

[0006]

In order to achieve the above object, a fan mounting device for a heat sink according to a first aspect of the present invention is a device for mounting a forced air cooling fan above a radiation fin of a heat sink, A claw case fitted into each of through holes provided at four corners of the holding frame of the fan, a beak-shaped holding claw loaded in the claw case, and a screw member for pressing and contacting, the claw case comprising: Has a screw hole for screwing the screw member in the upper wall portion, has a claw outlet in the lower portion, and the holding claw has a split groove cut from the tapered tip toward the base end, The pointed end is arranged to protrude downward from the claw outlet of the claw case, and the upper edge of the heat sink fin of the heat sink is inserted into the split groove of the holding claw protruding downward, and is inserted into the screw hole of the claw case. Said screwed from above By pressing the holding member against the holding claw, the holding claw is forcibly pushed downward in a form restricted by the opening width of the claw outlet and closing the split groove, and the upper edge portion of the radiation fin is It is characterized by being constituted so as to be clamped and fixed to the clamping claw.

According to the fan mounting device of the first aspect,
Conventionally, when attaching the forced air cooling fan to the heat sink, the fan can be fixed to the heat sink by clamping the upper edge of the radiating fin of the heat sink with the holding claws arranged at the four corners of the holding frame of the forced air cooling fan. Such a fan attachment is not required. However, in this installation, it is sufficient that the heat radiation fins of the heat sink exist at the positions of the holding claws. In a normal heat sink, the heat radiation fins are densely arranged on one side of the substrate, so that the vertical and horizontal dimensions, the height, or the substrate The same fan can be commonly used for heat sinks having different structures. Also, general forced air cooling fans are provided with through holes for bolting at the four corners of the holding frame, and the through holes can be used for mounting a claw case loaded with a holding claw,
In applying this mounting device, an existing fan can be used without any design change.

According to a second aspect of the present invention, in the fan mounting device of the first aspect, a flange portion is provided on an outer periphery of a lower end portion of the claw case to be engaged with a lower end opening edge of a through hole of the holding frame. A claw case is inserted into the through hole from below, and the pressing screw member is screwed into the screw hole via a washer having a diameter larger than that of the through hole. In this configuration, the claw case is pulled upward by the tightening operation of the pressing screw member, and the flange portion thereof comes into pressure contact with the lower opening edge of the through hole of the holding frame. At the same time, the heat radiation fins are clamped, and at the same time, the claw case is fixed to the holding frame.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a fan mounting device for a heat sink according to the present invention will be specifically described with reference to the drawings.

As shown in FIG. 1, a forced air cooling fan (1) is provided with an impeller (1) in a central circular opening (10a) of a holding frame (10) made of a metal or synthetic resin having a square shape.
2) is a general form in which the holding frame (1) is arranged.
The through-holes (11) in the vertical direction are provided at the four corners of (0).
On the other hand, the heat sink (2) is a skive heat sink made of aluminum or an alloy thereof, and has a rectangular substrate portion (2).
On the upper surface side of 0), a large number of substantially rectangular heat dissipating fins (21), which are curved by shaving, are integrally formed in two rows on the left and right and are closely arranged in front and rear.

Thus, in order to attach the forced air cooling fan (1) to the heat sink (2), each of the through holes (11) of the holding frame (10) of the fan (1) has an inner holding claw (3). ) Is inserted into the claw case (4),
Each claw case (4) is fixed to the holding frame (10) by a washer (5) and a screw (6). The holding claws (3) and the claw case (4) are made of metal or hard synthetic resin.

As shown in FIGS. 2 to 4, a claw case (4)
Has a vertical cylindrical shape with an outer diameter suitable for fitting in the through hole (11) of the holding frame (10), and has a flange portion (4
1) A screw hole (42) is provided at the center of the upper wall (4a), and a slit-shaped claw outlet (4) is provided along the radial direction at the bottom wall (4b).
3) A rectangular opening (44) is formed in the peripheral wall (4c). The claw outlet (43) has tapered surfaces on both side surfaces (43a) and (43a) so as to increase the opening width from the outside (lower side) to the inside (upper side), and the width of the rectangular opening (44). It is also open to the side at the middle position in the direction.

As shown in FIGS. 2 and 4, the holding claw (3) has a split groove (30) cut along one axis from one end of the cylinder to the other end. The outer side is obliquely cut off so that the halved both sides become thinner toward the cut end side of the split groove (30).
1) Formed as (31), that is, formed as a beak as a whole. The holding claw (3) is loaded into the claw case (4) from the side through the rectangular opening (44), and the tapered side portions (31) and (31) on both sides are provided on both sides of the claw outlet (43). In contact with the surfaces (43a) and (43a),
The tip (3a) side is projected outward (downward) from the nail outlet (43).

The claw case (4) loaded with the holding claws (3) is inserted from below into the through holes (11) of the holding frame (10) of the fan (1), and is inserted into the screw holes (42). By screwing a screw (6) from above through a washer (5) larger in diameter than the through hole (11), the holding frame (1) is inserted.
It is fixed so that it cannot be removed from 0). In addition, the height of the claw case (4) is such that the flange portion (41) is formed through the through hole (11).
The upper surface of the upper wall portion (4a) is set to be substantially at the same level as the upper surface of the holding frame (10) at a position where the upper surface of the upper frame portion (4a) is engaged with the lower opening edge of the holding frame.

Thus, before the forced air cooling fan (1) is attached to the heat sink (2), the tip of the screw (6) lightly contacts the upper surface of the holding claw (3) as shown in FIG. At this point, the screw head (6a) is left loose from the washer (5). When the forced air cooling fan (1) is attached to the heat sink (2), the fan (1) is put on the heat sink (2), and as shown in FIG. After inserting the upper edge of the radiation fin (21) of the heat sink (2) into the groove (30), the screw (6) is tightened.

By this tightening operation, the holding claws (3)
Is forcibly pushed down by the pressing of the tip of the screw (6), but the width of the claw case (4) in the direction perpendicular to the split groove (30) becomes larger toward the top, so that the claw outlet (43) of the claw case (4). As a result, the fins (2) are deformed so as to close the split groove (30) due to the opening width of the radiating fins (2) entering the split groove (30) as shown in FIG.
1) Firmly clamp the upper edge. Therefore, the fan (1)
Is to hold and fix the radiating fins (21) by the holding claws (3) arranged at the four corners of the holding frame (10) in the same manner as described above.
It can be securely and firmly attached to the heat sink (2).

According to this fan mounting device, a special fan mounting attachment as in the prior art is not required, so that the cost of the entire CPU cooler can be significantly reduced, and the forced air cooling fan (1) The mounting operation is also easy. In this mounting device, if the radiating fins (21) of the heat sink (2) are present at the positions of the holding claws (3), the vertical and horizontal dimensions and height of the heat sink (2) or the structure of the substrate (20) are provided. Irrespective of such differences, the fan (1) can be mounted, but the heat sink (2) has the same structure because the heat radiation fins (21) are densely arranged on one side of the substrate (20). The fan (1) can be used without trouble as a common product for various heat sinks (2). Further, the general forced air cooling fan (1) is provided with through holes (11) for bolting at four corners of the holding frame (10), and the claw case (4) is made using the through holes (11). Can be mounted, so that an existing general fan can be used without any design change when applying this mounting device.

The fan mounting apparatus for a heat sink according to the present invention is not limited to the skype heat sink as exemplified in the above-described embodiment. Any material having a small thickness that can enter the split groove (30) of (3) can be applied without any problem. Since the radiating fins of the Skype heat sink are curved by shaving, the fins are slightly buckled when the fins are clamped by the clamping claws (3) illustrated in the above embodiment, for example, as shown in FIG. As described above, by using the holding claw (7) in which the direction of the split groove (70) is inclined with respect to the axial direction, and adjusting the inclination direction to the bending direction of the radiation fin (21),
The deformation at the time of pinching can be suppressed.

In the above embodiment, the claw case (4) is pulled upward by the screwing operation of the screw (6), and its flange portion (41) is formed at the lower end opening edge of the through hole (11) of the holding frame (10). And is fixed to the holding frame (10). Therefore, the screw (6) is used for holding operation by the holding claw (3) and the holding frame (1) of the claw case (4).
0), and has a smaller number of parts, thereby reducing manufacturing costs and material costs. However, in the present invention, the screw (6) is a dedicated pressing screw for causing the holding claw (3) to perform a holding operation, and the claw case (4) is separately held by a screw or welding. You may make it fix to (10).

Further, in the present invention, the holding claw (3)
The point (3a) is not a square as in the above embodiment, but a round shape like a drawing glass mouth, or the claw case (4) and the screw (6) to prevent co-rotation. A locking portion may be provided between (4) and the holding frame (10). Also, both side surfaces (43) of the nail outlet (43)
a) and (43a) are preferably formed on a tapered surface as in the above-described embodiment, but may be formed on a plane parallel to the axis of the claw case (4). Various design changes are possible.

[0021]

According to the heat sink fan mounting apparatus according to the first aspect of the present invention, there is no need for a dedicated attachment corresponding to the type of heat sink as in the prior art, and forced air cooling using simple small parts. The mounting frame of the fan can be directly attached to the heat sink, and the mounting operation is easy, so that the manufacturing cost and the mounting cost of the whole CPU cooler for personal computers etc. can be greatly reduced, and a single-type fan Can be used as a common product for heat sinks with different dimensions and structures,
In addition, an existing fan can be used without any design change.

According to the second aspect of the present invention, in the above-mentioned fan mounting apparatus, the operation of clamping the holding claw for fixing the fan to the heat sink and the fastening of the claw case loaded with the holding claw to the fan holding frame are performed. Since it is carried by a single screw member, there is an advantage that the number of parts can be reduced and the manufacturing and material costs can be reduced accordingly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a forced air cooling fan and a heat sink used in an embodiment of a heat sink fan mounting apparatus according to the present invention.

FIG. 2 is an exploded perspective view showing a main part of a holding frame of the fan and mounting parts according to the embodiment.

3A and 3B show a claw case used in the embodiment, wherein FIG. 3A is an axial cross-sectional view, and FIG. 3B is a cross-sectional view taken along a roll line in FIG.

FIG. 4 is a longitudinal sectional view of a main part of a holding frame of the fan in the embodiment.

FIGS. 5A and 5B show an operation of attaching a forced air cooling fan to a heat sink according to the embodiment; FIG. 5A is a longitudinal sectional view of a main part before fixing, and FIG. It is.

FIG. 6 is a longitudinal sectional view of a main part showing another embodiment of the heat sink fan mounting device according to the present invention.

FIG. 7 is a perspective view showing a conventional state in which a forced air cooling fan is attached to a heat sink.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 forced air cooling fan 10 holding frame 11 through hole 2 heat sink 20 substrate unit 21 radiating fin 3 holding claw 3a pointed end 3b base end 30 split groove 4 claw case 4a top wall 4b bottom wall 41 flange 42 screw hole 43 nail protruding Mouth 5 Washer 6 Screw (Pressing screw member)

Claims (2)

[Claims] 1. A device for mounting a forced air cooling fan above radiation fins of a heat sink, comprising: claw cases respectively fitted into through holes provided at four corners of a holding frame of the fan; A beak-shaped gripping claw, and a screw member for press-fitting, wherein the claw case includes a screw hole for screwing the screw member into an upper wall portion, and a claw outlet at a lower portion. The pinching claw has a split groove cut from the tapered tip toward the base end side, and is arranged so that the tip end protrudes downward from the claw outlet of the claw case. The upper edge of the radiating fin of the heat sink is inserted into the split groove of the heat sink, and the screw member screwed from above into the screw hole of the claw case is pressed against the holding claw, whereby the holding claw is brought out of the claw outlet. Is closed by the opening width Forcibly extruded downwardly that form,
A fan mounting device for a heat sink, wherein an upper edge portion of the radiation fin is configured to be clamped and fixed to the clamping claw. 2. A claw case is provided on a periphery of a lower end portion of the claw case with a flange portion which is engaged with a lower end opening edge of a through hole of the holding frame, and the claw case is inserted into the through hole from below, and The heat sink fan mounting device according to claim 1, wherein the pressing screw member is screwed into the screw hole via a washer having a diameter larger than the through hole.